/**
*      author: Y_Yao
*      created: 2024-12-02 22:41:22
**/

#include<bits/stdc++.h>

#define int LL
using namespace std;
using LL = long long;
const LL LLINF = 1e18;
const int INF = 0x3f3f3f3f;
const int N = 50 + 7;
int n,k;
int a[N];
int sum = 0;

void solve()
{
    sum = 0;
    cin >> n >> k;
    for(int i = 1;i <= n;i++)
    {
        cin >> a[i];
    }

    sort(a + 1, a + 1 + n);
    int i = n;
    while(sum < k)
    {
        sum += a[i];
        i--;
    }
    if(sum > k)
    {
        i++;
        sum -= a[i];
    }
    cout << k - sum << endl;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}